Abstract
The seminar focused on a special case of the invisible library:Galen's Epitome, produced by the physician Oribasius at the request of the emperor Julian, known as the Apostate, in the 4thcentury AD. There was also talk of a lost, then rediscovered work by Galen, the treatise Ne pas se chagriner, discovered by Antoine Pietrobelli in Thessalonica in 2005.